Samsung 21700-40T 4000mAh 35A High-Power Li-ion Battery for Power Tools

Product Specifications:
Model: 21700
Rated Capacity: 4000mAh
Minimum Capacity: 3900mAh
Nominal Voltage: 3.7V
Internal Resistance: ≤10mΩ
Discharge Rate: 10C
Max Discharge Current: 35A
Weight: 68g (approx. 0.15 lbs)
Dimensions: 21.35mm x 70.3mm (0.84 in x 2.77 in)
Positive Electrode Material: NCM (Nickel Cobalt Manganese Oxide)
Charge Cutoff Voltage: 4.2±0.05V
Discharge Cutoff Voltage: 2.5V
Charge Termination Current: 0.02C
Charge Time:
5 hours (0.2C constant current, 4.2V constant voltage charging)
1 hour (1C constant current, 4.2V constant voltage charging)
Operating Temperature:
Charge: 0°C ~ 45°C
Discharge: -20°C ~ 60°C
Storage: -20°C ~ 45°C
Cycle Life: ≥90% capacity retention after 1000 cycles

🔥 Key Features:
✅ 4000mAh High Capacity for Extended Runtime
Provides longer battery life, ideal for continuous use in high-power applications.

✅ 35A Continuous Discharge for Maximum Performance
Supports 10C high-rate discharge, delivering up to 35A output for power tools and demanding devices.

✅ Ultra-Low Internal Resistance ≤10mΩ
Ensures efficient power delivery, reducing energy loss and heat buildup for improved battery efficiency.

✅ 1000+ Charge Cycles for Long-Term Use
Premium NCM power cells maintain performance even after 1000+ cycles, making it cost-effective and durable.

✅ Advanced Safety Design with Built-in Pressure Valve
Explosion-proof safety vent quickly releases internal gases to prevent swelling, ensuring user safety.

✅ Eco-Friendly & Certified for Safety
Mercury-free, cadmium-free, and lead-free, complying with international safety standards for peace of mind.

🎯 Applications:
Samsung 21700-40T high-power lithium battery is widely used in various power-demanding applications, including:
🔹 Power Tools (Cordless drills, electric saws, screwdrivers)
🔹 Flashlights (Outdoor floodlights, tactical lights)
🔹 Electronic Instruments (Testing equipment, scientific devices)
🔹 Portable Fans (Handheld & USB-powered fans)
🔹 Massage Devices (Massage guns, fascia guns)
🔹 Bluetooth Speakers (Wireless audio systems)
🔹 Electric Vehicles (E-scooters, hoverboards)
🔹 Silicone Lamps (Creative and decorative lighting)

🚀 Power up your high-performance devices with Samsung 21700-40T Li-ion battery!